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UPSC Civil services Entrance exams General Studies test # General Science Cell Cycle and Cell Division Prepare / Learn

Q1. Various phases of cell cycle are controlled by proteins

A. Cytokines and Cyclins

B. Hormones and CDKs

C. Cyclins and CDKs

Answer : Option C
Explaination / Solution:

Cycline and CDKs can modify various protein substrates involved in cell cycle progression. Cancer results due to mutations of these proteins leading to uncontrolled cell divisions.

UPSC Civil services Entrance exams General Studies test # General Science Motion in A Plane Prepare / Learn

Q2. The path of a projectile is

A. straight line

B. cubic

C. hyperbola

D. a parabola

Answer : Option D
Explaination / Solution:

A particle with a vertical and horizontal velocity travelling in a gravitational field will trace out a parabola.

UPSC Civil services Entrance exams General Studies test # General Science Surface Chemistry Prepare / Learn

Q3. The colloidal solution of two immiscible liquids is called

A. Emulsion

B. Gel

C. None of these

D. Aerosol

Answer : Option A
Explaination / Solution:

Dispersed phase is liquid, dispersion medium is liquid.

UPSC Civil services Entrance exams General Studies test # General Science Development Experience Of India a Comparison with Neighbors Prepare / Learn

Q4. UNDP stands for

A. Union Nations Development Programme

B. United Nations Development Programme

C. United Nations Development Policy

D. United Nations Development Plan

Answer : Option B
Explaination / Solution:

The United Nations Development Programme (UNDP) works to eradicate poverty and reduce inequalities through the sustainable development of nations.It provides expert advice, training and grants support to developing countries, with increasing emphasis on assistance to the least developed countries.

UPSC Civil services Entrance exams General Studies test # General Science Electric Charges and Fields Prepare / Learn

Q5. At any point on S on an electric field line

A. the curvature is in the direction of

\vec{E}

at that point

B. the tangent to the line is in the direction of

\vec{E}

at that point

C. the binormal to the line is in the direction of

\vec{E}

at that point

D. the perpendicular to the line is in the direction of

\vec{E}

at that point

Answer : Option B
Explaination / Solution:

When a tangent is drawn at any point on field line then that tangent gives the direction of electric field at that point

UPSC Civil services Entrance exams General Studies test # General Science Mechanical Properties of Solids Prepare / Learn

Q6. Young’s modulus Y is

A. the ratio of tensile (or compressive) stress (σ) to the longitudinal str

B. the ratio of longitudinal strain (ε) to the tensile (or compressive) stress (σ)

C. the ratio of shear strain (θ) to the longitudinal stress (σ)

D. the ratio of shear stress (σ) to the longitudinal strain (θ)

Answer : Option A
Explaination / Solution:

The ratio of stress and strain is called modulus of elasticity is the characteristic of the material. they are (a) Young's modulus (b) Shear Modulus (c) Bulk modulus

Young's Modulus is denoted by Y and is given by the ratio of tensile (or compressive) stress $(σ) " role="presentation" style="display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;"> (σ)$ to the longitudinal strain $(ε) " role="presentation" style="display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;"> (ε)$ Y = tensile stress/longitudinal strain $Y = σ / ϵ " role="presentation" style="display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;"> Y = σ / ϵ$

UPSC Civil services Entrance exams General Studies test # General Science Biotechnology Principles and Processes Prepare / Learn

Q7. DNA is extracted by

A. Heat shock

B. Denaturation

C. Ethanol Precipitation

D. Chilling treatment

Answer : Option C
Explaination / Solution:

The piece of DNA obtained by gel electrophoresis contains agrose gel also. Ethanol precipitation is a commonly used technique for concentrating and de-salting nucleic acids (DNA or RNA) preparations in aqueous solution. The basic procedure is that salt and ethanol are added to the aqueous solution, which forces the precipitation of nucleic acids out of solution.

UPSC Civil services Entrance exams General Studies test # General Science Excretory Products and their Elimination Prepare / Learn

Q8. Which of the following is not a part of glomerular filtrate?

A. globulins

B. glucose

C. inorganic salts

D. creatinine

Answer : Option A
Explaination / Solution:

Glomerular filtrate contains glucose, inorganic salts and creatinine but it do not contain globulins protein.

UPSC Civil services Entrance exams General Studies test # General Science Thermodynamics Prepare / Learn

Q9. The heat engine takes

A. heat

Q_{1}

from a hot reservoir at temperature

T_{1}

, releases heat

Q_{2}

to a cold reservoir at temperature

T_{2}

and delivers work W to the surroundings

B. heat

Q_{1}

from a cold reservoir at temperature

T_{1}

, releases heat

Q_{2}

to a hot reservoir at temperature

T_{2}

and delivers work W to the surroundings

C. heat

Q_{1}

from a hot reservoir at temperature

T_{1}

, releases heat

Q_{2}

to a hot reservoir at temperature

T_{2}

and delivers work W to the surroundings

D. heat

Q_{1}

from a cold reservoir at temperature

T_{1}

, releases heat

Q_{2}

to a cold reservoir at temperature

T_{2}

and delivers work W to the surroundings

Answer : Option A
Explaination / Solution:

a heat engine converts heat energy to mechanical work by using the temperature difference between a hot "source" and a cold "sink". Heat is transferred from the source, through the "working body" of the engine, to the "sink", and in this process some of the heat changes into work by using the qualities of the gas or liquid inside the engine.

UPSC Civil services Entrance exams General Studies test # General Science Evolution Prepare / Learn

Q10. By studying analogous structures we look for

A. Similarities in cell make up

B. Similarities in appearance and function but different in structure

C. Similarities in organ structure

D. Similarities in appearance but differences in functions

Answer : Option B
Explaination / Solution:

In evolutionary biology, the term analogous structures pertain to the various structures in different species having the same function but have evolved separately, thus do not share common ancestor. Examples of analogous structures are as follows: wings of insects and birds used for flying

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